F1 A Java program. Ch 1 in PPIJ. Introduction to the course. The computer and its workings The algorithm concept

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1 F1 A Java program Ch 1 in PPIJ Introduction to the course The computer and its workings The algorithm concept The structure of a Java program Classes and methods Variables Program statements Comments Naming conventions Compiling and execution Manual compilation Using an IDE Basic I/O System.out Demo: Hello World The Java Standard Library java.lang java.io java.util

2 F2 Data storage Ch 2 in PPIJ Variables The type concept The declaration concept Simple assignment Constants Primitive data types in Java byte char boolean short int and long float and double Type conversions Automatic type conversions Explicit type conversions Object data types Reference variables Class String

3 F3 Standard input + operations on primitive values CH 3 and 4 in PPIJ Basic I/O The streams concept System.in Java.util.Scanner Characters Strings Numbers The expression concept Operations on integers Standard arithmetic Integer expressions Automatic type conversions in computation Over- and underflow in results Operations on floating point numbers Floating point expressions Automatic type conversions in computation Rounding +/- infinity The precedence order of operators, and parentheses Ex: * 4 vs (2 + 3) * 4 Operations on a variable Assignment operators Increment- and decrement operators Comparing primitive values Numeric comparison operators Boolean comparison operators Logical operations Conjunction and disjunction Negation Logical expressions

4 F04 Logic Ch 5 in PPIJ The concepts sequence, selection, and iteration A statement and a block of statements Conditional statements If If-else The? operator Switch Iteration While Do while For-loop For-each loop (Iterable) Nested loops Break Continue

5 F05 Vectors (Arrays) Ch 6 in PPIJ One-dimensional vectors Index Creating and using a vector Length Vectors are objects The vector variable is a reference type Static initialization of a vector For- and for-each loops Multi-dimensional vectors A vector of references to references to data Matrices Cubes The concepts element data type, and vector data type

6 F06 Methods Ch 7 in PPIJ Creating and using methods The concept of a subprogram Example (the underlining method) Parameters The concept of a function The return value Expressions in actual parameters (arguments) Managing methods Sequences of method calls Method call chains Selecting the method by parameter type overloading Local variables Global variables Recursive iteration Vectors as parameters and return values A variable number of arguments

7 F07 A class library Distributed code Class libraries Packages The Java Standard Library Java.lang.Math Java.lang.String Wrapper classes Integer Character Java.lang.System Java.util.Arrays Exceptions The exception hierarchy Checked vd unchecked Create, throw, declare

8 F08 Algorithms (1/2) Ch 9 in PPIJ A problem and an algorithm A problem and its instances Algorithm description Selection algorithms A prioritized element The update algorithm Sorting algorithms Selection sort Insertion sort Search algorithms Sequential search Binary search

9 F09 Objects (1/1) Ch 10 in PPIJ Defining, creating, and using objects A composite data type Initialization Methods and behavior The Object.toString method Encapsulation and interfaces References to objects Objects that manage strings String StringBuffer/StringBuilder java.util.scanner Immutable objects References to strings Using Scanner Typical services by an object Inspectors Mutators Combiners Comparators Predicates Transformers

10 F10 Algorithms (2/2) Ch 9 in PPIJ The complexity of an algorithm The complexity function Estimating the order of a complexity function The correctness of an algorithm Specification and meaning Review Tracing Proof

11 F11 Objects (2/2) Ch 10 in PPIJ Object resources String.length() String.isEmpty() Integer.<type>Value() Integer.equals() Integer.toString() Class resources String.valueOf(<type>) Integer.parseInt Integer.MIN_VALUE, Integer.MAX_VALUE Classes in Java Inheritance The class hierarchy Autoboxing/Unboxing Vectors of references to objects Matrices Passing a vector as a parameter java.util.arrays.sort Parameters to main Algorithms in conjunction with objects

12 F12 Exceptions Ch 11 in PPIJ Managing exceptions Creating, throwing, declaring Catch and manage Catch at the right level The exception hierarchy Sequence ordering in catch RuntimeException unchecked Nested try-catch clauses try-catch-finally try-with-resources Rethrown exception Defensive coding exceptions should be exceptional

13 F13 In- and output Ch 12 in PPIJ Stream Byte-streams Buffered streams Character streams Data streams Object streams Stdin and stdout java.io.inputstreamreader java.util.scanner java.io.printwriter System.out Formatted output printf Managing files java.io.file Directories and files Textfiles Binary files Unicode vs local encoding Writer with subclasses BufferedWriter InputStreamReader Close Outputstream with subclasses InputStream with subclasses Buffered streams Primitive data types and strings Objects in files java.io.serializable ObjectOuputStream ObjectInputStream Random access files

14 F14 Creating new object types (1/2) Ch 13 in PPIJ Composite data types Vectors Definition class The standard library Objects with data Variables Initialize Constructor Operations Methods Encapsulation and interfaces Private and public members Accessor methods Access levels

15 F15 Creating new object types (2/2) Ch 13 in PPIJ Instance resources and class resources Class variables Class methods An object s references to other objects Dependencies Independent references Retain control (return copies) Strings are immutable Instantiation in the declaration Inner classes Managing compex inner instance properties Person Internal dynamic data structures Linked list

16 F16 Developing new object types Ch 14 in PPIJ Defining a new type of object Modelling, design, revision Choosing instance variables Accessor and mutator methods Help classes Defining constructors Defining methods Designing services Combiner methods Comparators Predicates Converters Static variables Static methods Implementing the definition class Constructors Instance methods Testing Comments Creating and displaying objects Testing services Assert Test program Junit Code comments Javadoc Documentation

17 Lecture 17 Inheritance Ch 15 in PPIJ Subclasses Extending an existing type Constructors in subclasses Methods in subclasses Overriding methods in the superclass Access protection in the superclass Super- and subclass references Vertical type derivation Polymorphism and dynamic binding Access via the superclass type Denying class extension

18 Lecture 18 Class hierarchies Ch 16 in PPIJ Class hierarchy Simple inheritance Common superclass Inheritance chain Java and class Object Inheriting from the standard library Managing a class hierarchy Abstract superclasses Inheriting from an abstract class Managing objects with the same superclass Vector The instanceof operator More of class Object The class Class getclass vs instanceof Object.equals References to Object Type independent programming Managing a local class hierarchy Number

19 F19 Class hierarchies and interfaces Ch in PPIJ Type independent data structures Generic types Interface classes Comparable Implementing an interface Empty interfaces References to interface types Constants in interfaces

20 F20 Interfaces Ch 17 in PPIJ Type independent programming with interfaces Hierarchies of interfaces Methods with interfaces as parameters and return type Type expressions Interface vs multiple inheritance Interfaces and inner classes Standard Anonymous inner classes

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